RLIST, NSET1, NSET2, NINC
Lists the real constant sets. 
NSET1, NSET2, NINCList real constant sets from NSET1 to NSET2 (defaults
to NSET1) in steps of NINC (defaults
to 1).  If NSET1 = ALL (default), ignore NSET2 
and NINC and list all real constant sets [R].